14
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Troubleshooting
Installer reference guide
240
EPRA14~18D + ET23E
Daikin Altherma 3 H HT F
4P644739-1A – 2022.03
14.3.6 Symptom: The pump is making noise (cavitation)
Possible causes
Corrective action
There is air in the system
Purge air manually on both zones (see
"To perform a manual air
purge"
220]) or use the automatic air
purge function on both zones (see
perform an automatic air
purge"
220]).
The water pressure at the pump inlet is
too low
Check and make sure that:
▪
The water pressure is >1 bar.
▪
The water pressure sensor is not
broken.
▪
The expansion vessel is NOT broken.
▪
The valve (if equipped) of the water
circuit towards the expansion vessel is
open.
▪
The pre-pressure setting of the
expansion vessel is correct (see
"8.1.4 Changing the pre-pressure of
the expansion vessel"
79]).
14.3.7 Symptom: The pressure relief valve opens
Possible causes
Corrective action
The expansion vessel is broken
Replace the expansion vessel.
The valve (if equipped) of the water
circuit towards the expansion vessel is
closed.
Open the valve.
The water volume in the installation is
too high
Make sure that the water volume in the
installation is below the maximum
allowed value (see
76] and
"8.1.4 Changing the pre-pressure of the
expansion vessel"
The water circuit head is too high
The water circuit head is the difference
in height between the indoor unit and
the highest point of the water circuit. If
the indoor unit is located at the highest
point of the installation, the installation
height is considered 0 m. The maximum
water circuit head is 10 m.
Check the installation requirements.
Summary of Contents for ETVZ16E6V7
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